Autor: Hascoët, J.-Y. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Advanced open CNC system with in process tool path compensation
Autorzy:: Hascoet, J.-Y.
Rauch, M.
Powiązania:: https://bibliotekanauki.pl/articles/99609.pdf
Data publikacji:: 2014
Wydawca:: Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:: open NC controller
simulation,manufacturing
tool path
compensation
Opis:: Despite several technical advances over the last decade, CNC controlled manufacturing still bases upon outdated paradigms: manufacturing data are generated and transferred along a heterogeneous and divided CAD/CAM/CNC data chain. The role of the NC controller is limited to the execution of tool paths generated beforehand and the possibility of online tool path adaptation is not planned in legacy NC controllers. In contrast, practical observations make this legacy approach quite inappropriate in an industrial framework. Significant geometrical variability is sometimes observed both prior and after milling in parts that belong to the same batch. In that context, the integration of online tool path adaptation strategies appears to be essential. In this paper, a methodology for correcting the tool path in real-time thanks to measurements provided by a laser scanner moving with the tool is introduced. The resulting local information is used to approximate the workpiece exact geometry by using a POD (Prosper Orthogonal Decomposition) snapshot technique and to adjust the path in accordance. This method has the great advantage of taking into consideration geometrical features such as curvature, twist but also additional parameters whose impact on the tool path is significant (unexpected initial setup of the part for example). This method has been implemented on the advanced CNC programming platform of the laboratory, which hosts in particular a high speed machining centre equipped with an open NC controller.
Źródło:: Journal of Machine Engineering; 2014, 14, 3; 48-57
1895-7595
2391-8071
Pojawia się w:: Journal of Machine Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Interests of 5 axis toolpaths generation for Wire Arc Additive Manufacturing of aluminum alloys
Autorzy:: Hascoët, J.-Y.
Querard, V.
Rauch, M.
Powiązania:: https://bibliotekanauki.pl/articles/99951.pdf
Data publikacji:: 2017
Wydawca:: Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:: additive manufacturing
5 axis manufacturing
WAAM
Opis:: Additive Manufacturing (AM) for metal part can be divided into two different types: The powder technology and the wire technology. Usually, powder is adapted for fine components and small parts whereas wire is used for structural components and large scale part. One of the main benefits of AM is to simplify assemblies by reducing the number of components and to provide a large freedom of design. A standard AM system consists of a combination of three blocks: a motion system, a heat source and a feedstock. For Wire Arc Additive Manufacturing (WAAM), the heat source is a welding generator and the feedstock is a wire. The motion system generally used is a 6 axis robot or a CNC machine. This paper aims to propose a methodology to generate 5 axis toolpaths for WAAM and highlight the main parameters which selection is a key issue to resolve. The goal is to compare 3 axis and 5 axis toolpaths on part accuracy, depending the clearance angle of the part.
Źródło:: Journal of Machine Engineering; 2017, 17, 3; 51-65
1895-7595
2391-8071
Pojawia się w:: Journal of Machine Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Toolpaths Programming in an Intelligent Step_NC Manufacturing Context
Autorzy:: Laguionie, R.
Rauch, M.
Hascoet, J.-Y.
Powiązania:: https://bibliotekanauki.pl/articles/971114.pdf
Data publikacji:: 2008
Wydawca:: Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:: Step_NC
toolpath generation
pattern strategy
Opis:: The current language for CNC programming is G-code which dates from the beginning of the eighties with the norm ISO 6983. With the new technologies, G-code becomes obsolete. It presents drawbacks that create a rupture in the numerical chain at the manufacturing step. A new standard, Step_NC, aims to overtake these lacks. A Step_NC file includes all the information for manufacturing, as geometry description of the entities, workplan, machining strategies, tools, etc. For rough pocket milling, the ISO norms propose different kind of classical strategies as bidirectional, parallel or spiral contour, etc. This paper describes a new way of toolpath programming by the repetition of a pattern all along a guide curve. It presents several advantages as building fastness and easiness. The integration of pattern strategies in Step_NC standard is an other step for the development of these strategies but also for the enrichment of Step_NC possibilities. A complete Step_NC numerical chain was built, integrating these pattern strategies. The implementation of this approach of building pattern strategies was made by the development of tools for the complete manufacturing cycle, from the CAD file to the machined part. Several application cases were experimented on machine tool to validate this approach and the efficiency of the developed tools.
Źródło:: Journal of Machine Engineering; 2008, 8, 1; 33-43
1895-7595
2391-8071
Pojawia się w:: Journal of Machine Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Enhancing CNC Manufacturing Interoperability with Step-NC
Autorzy:: Rauch, M.
Laguionie, R.
Hascoet, J.-Y.
Xu, X.
Powiązania:: https://bibliotekanauki.pl/articles/971256.pdf
Data publikacji:: 2009
Wydawca:: Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:: STEP-NC
advanced CNC
programming CAD/CAM/CNC data interoperability
Opis:: Despite substantial improvements CNC manufacturing is still based on dated practices and habits. This is mostly due to the use of ISO 6983 standard (G-codes) combined with vendor specific formats to exchange CAD/CAM/ CNC information. The manufacturing sector is consequently made of a collection of disconnected elements that are difficult to make communicate together. On the contrary STEP-NC approach offers many opportunities to overtake the current situation and rethink CAD/CAM/CNC numerical chains. However, the actual integration of STEP-NC in industrial concerns is quite limited. It is essential to couple this innovative approach with existing equipments. This paper shows how STEP-NC can be an efficient way to reconcile today's interoperability and efficiency demands by introducing the association of two manufacturing platforms: SPAIM, developed at IRCCyN (France), and which controls current industrial machine tools directly from STEP-NC files and IIMP from the University of Auckland (New Zealand), which realizes data portability between heterogeneous proprietary formats, process interoperability. As a result, both approaches lead to improved supervision and integration of the machining systems.
Źródło:: Journal of Machine Engineering; 2009, 9, 4; 26-38
1895-7595
2391-8071
Pojawia się w:: Journal of Machine Engineering
Dostawca treści:: Biblioteka Nauki

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